Thanks a lot Giri! The user's manual of the probe indicates that the probe requires an excitation voltage in the range of 2 to 5 volts, and the output will be between 10 and 50% of the excitation voltage. So I think that the MDA100 can be used in this case.
Thanks for your help! On Fri, Feb 29, 2008 at 6:25 PM, Giri Baleri <[EMAIL PROTECTED]> wrote: > If the ECH2O sensor requires 3V excitation and puts out 0-3V DC output, > then you should be able to connect it to MDA100. > If it requires 5V excitation, then your options are to use it with MDA300 > or MDA320. > > I hope that helps, > Giri > > ------------------------------ > *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *relateness > *Sent:* Friday, February 29, 2008 7:49 AM > *To:* [email protected] > *Subject:* [Tinyos-help] MDA100 or MDA300 ? > > Hi, > > I have to connect an external sensor (ech2o probes for measuring the soil > moisture) to a mote, but I don't know if this is possible with MDA100 > boards. To use these probes, I have to send an excitation on a specified > pin, and receive the analog output on an other pin. Some people have done > this using MDA300 boards, but I would like to know if this is also feasible > with MDA100. > > Thanks in advance! >
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